Class 6 Maths Chapter 5 Exercise 5.3 Pdf Notes NCERT Solutions

Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise 5.3 pdf notes:-

Exercise 5.3 Class 6 maths Chapter 5 Pdf Notes:-

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Ncert Solution for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise 5.3 Tips:-


Angles – ‘Acute’, ‘Obtuse’ and
We saw what we mean by a right angle and
a straight angle. However, not all the angles
we come across are one of these two kinds.
The angle made by a ladder with the wall
(or with the floor) is neither a right angle
nor a straight angle.
Think, discuss and write
Are there angles smaller than a right angle?
Are there angles greater than a right angle?
Have you seen a carpenter’s square? It looks like the letter
“L” of English alphabet. He uses it to check right angles.
Let us also make a similar ‘tester’ for a right angle.

Suppose any shape with corners is given. You can use your RA tester to test
the angle at the corners.
Do the edges match with the angles of a paper? If yes, it indicates a
right angle.

The hour hand of a clock moves from 12 to 5.
Is the revolution of the hour hand more than
1 right angle?

Try These:-

  1. What does the angle made by the hour hand of the clock
    look like when it moves from 5 to 7. Is the angle moved
    more than 1 right angle?
  2. Draw the following and check the angle with your RA tester.
    (a) going from 12 to 2 (b) from 6 to 7
    (c) from 4 to 8 (d) from 2 to 5
  3. Take five different shapes with corners. Name the corners. Examine
    them with your tester and tabulate your results for each case :

Do you see that each one of them is less than one-fourth of a revolution?
Examine them with your RA tester.
If an angle is larger than a right angle, but less than a straight angle, it is
called an obtuse angle. These are obtuse angles.

Do you see that each one of them is greater than
one-fourth of a revolution but less than half a revolution?
Your RA tester may help to examine.
Identify the obtuse angles in the previous examples too.
A reflex angle is larger than a straight angle.
It looks like this. (See the angle mark)
Were there any reflex angles in the shapes you made earlier?
How would you check for them?

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